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    Great changes in China in the past 20 years. A.are taking place B.have been taken place C.have taken place D.are being taken place 【查看更多】

     

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     Great changes _____ in China in the past 20 years.  

       A. have taken place           B. have been taken place  

       C. took place                D. are taking place

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     Great changes _____ in China in the past 20 years.  

       A. have taken place           B. have been taken place  

       C. took place                D. are taking place

    查看答案和解析>>


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